Law enforcement personnel have responded to active shooter who is barricaded in an apartment complex in Panama City, Florida. Witnesses report numerous shots being fired and the Walton County Sheriff’s Office believes the suspect is tied to a “suspicious death” uncovered earlier in the day.

A North Texas sheriff left no doubt about his policy on engaging active shooters. The sheriff made it clear his deputies will not wait for SWAT or other agencies. “We go into engage and stop the shooter and save lives,” the sheriff wrote in a memorandum on Wednesday.

Details are beginning to emerge about the alleged murderer who carried out a deadly shooting at a San Francisco UPS processing facility that claimed the lives of four people Wednesday, including the shooter.

News outlets in Texas are reporting that at least two shooters are involved in what appears to be a robbery gone bad in a San Antonio, Texas, mall. Reports indicate that one person was killed, and five others were taken to area hospitals. A licensed Texas gun owner stepped in and shot one robber after that man allegedly killed a Goood Samaritan.

Update: 4:15 p.m. PST: According to the Desert Sun: “One person is dead and three others injured after a shooting near a Los Angeles-area polling place, a LA fire official said. At least one nearby polling place was locked down, the

One woman is dead and four others were wounded in two separate shooting incidents in Austin, Texas. The first shooting occurred in the heart of the city’s famous 6th Street entertainment district while the second occurred a few blocks away.

Joint Base Andrews, located in suburban Maryland near Washington, D.C., was placed on lockdown Thursday morning after reports of an active shooter, with instructions for all personnel to “shelter in place.”

On Wednesday, a man with a “high-powered rifle” shot at police responding to a domestic violence call, and fired more shots at a neighboring apartment complex, prompting police to lock down streets in the area and causing the Federal Aviation Administration to shut down flights to and from San Diego International Airport.

In the wake of the October 1 attack in the gun-free facilities of Umpqua Community College, the University of Maryland has released active shooter response guidelines that advise students to “run” and “hide.”

In what is presented as an effort to mentally prepare students and faculty alike on how to react to an active shooter on campus, “certain schools” located in Oregon, Florida, and New Jersey have adopted “unannounced active-shooter drills.”